<?php
class My_Controller_Admin_Choix extends My_Controller_Admin_Action
{
    public function init()
    {
        if (!$this->_getParam('num_vente')) {
            $this->_redirect('admin/choix');
        }
        parent::init();
        $this->view->numVente = $this->_getParam('num_vente');
    }
}